Gas burner



FIG. 1 is a top elevational view of the gas burner;

FIG. 2 is a bottom elevational view of the gas burner;

FIG. 3 is a left side elevational view of the gas burner;

FIG. 4 is a right side elevational view of the gas burner;

FIG. 5 is a front plan view of the gas burner; and,

FIG. 6 is a rear plan view of the gas burner. 

The ornamental design for a gas burner, as shown and described. 